fix: enable enforce-canonical-classes tailwind lint rule (#9427)

## Summary

Enable `better-tailwindcss/enforce-canonical-classes` lint rule and
auto-fix all 611 violations across 173 files. Stacked on #9417.

## Changes

- **What**: Simplify Tailwind classes to canonical forms via `eslint
--fix`:
  - `h-X w-X` → `size-X`
  - `overflow-x-hidden overflow-y-hidden` → `overflow-hidden`
  - and other canonical simplifications
- Enable `enforce-canonical-classes` as `'error'` in eslint config

## Review Focus

Mechanical auto-fix PR — all changes produced by `eslint --fix`. No
visual or behavioral changes; canonical forms are functionally
identical.

**Stack:** #9417 → **this PR** → PR 3 (class order)

Fixes #9300 (partial — 2 of 3 rules)

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-9427-fix-enable-enforce-canonical-classes-tailwind-lint-rule-31a6d73d365081a49340d7d4640ede45)
by [Unito](https://www.unito.io)

src/components/graph/widgets/DomWidget.vue

@@ -2,14 +2,14 @@
   <div
     v-show="widgetState.visible"
     ref="widgetElement"
-    class="dom-widget h-full w-full"
+    class="dom-widget size-full"
     :title="tooltip"
     :style="style"
   >
     <component
       :is="widget.component"
       v-if="isComponentWidget(widget)"
-      class="h-full w-full"
+      class="size-full"
       :model-value="widget.value"
       :widget="widget"
       v-bind="widget.props"